Electro-catalysis application of horseradish peroxidase sensor constructed by black phosphorus-based composite material

Abstract

The invention relates to preparation of a thin-layer black phosphorene / single-walled carbon nanotube composite material and electro-catalysis application of the thin-layer black phosphorene / single-walled carbon nanotube composite material in construction of a horseradish peroxidase electrochemical sensor. A nano composite material is prepared by adopting a liquid phase stripping method and a physical mixing method and is used for modifying horse radish peroxidase to construct an enzyme electrochemical sensor, and the enzyme electrochemical sensor is applied to electrocatalysis of trichloroacetic acid, sodium nitrite and hydrogen peroxide. The preparation method mainly comprises the following steps: preparing thin-layer black phosphorene, compounding the thin-layer black phosphorene with a single-walled carbon nanotube, preparing a thin-layer black phosphorene / single-walled carbon nanotube composite material, modifying the surface of an ionic liquid electrode with the composite material, preparing the enzyme electrochemical sensor with a sandwich structure, and performing electro-catalysis application of the enzyme electrochemical sensor. The composite material prepared by the invention has the advantages of larger effective area, special morphology and stronger conductivity, can improve the stability and dispersity of black phosphorene, and is simple in preparation process, sensitive in detection and good in determination effect.

Description

technical field

[0001] The invention belongs to the preparation method and application field of an electrochemical sensor, and relates to the preparation of a black phosphorene (BPNs) / single-walled carbon nanotube (SWCNTs) composite material and an electrochemical sensor for constructing a horseradish peroxidase (HRP) electrochemical sensor. Catalytic applications. Background technique

[0002] Black phosphorus (BP) is an allotrope of phosphorus, commonly known as phosphorene. Two adjacent BP layers are superimposed together by van der Waals force. This unique layered structure makes black phosphorus have many excellent properties. Such as direct bandgap with controllable number of layers, high carrier mobility, obvious anisotropy and good biocompatibility, which are widely used in photoelectrochemistry, biomedicine, solar cells, lithium-ion batteries / sodium-ion batteries , transistors, electronic components and other fields have broad application prospects. With the in-de...

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